AMG Systems Ltd. reserves the right to make changes to this
document without notice. The info
rmation herein is believed to
be accurate. No responsibility is assumed by AMG for its use.
Page
1
of
8
AMG3741EG
-
DR
-
SF
Instruction
Sheet
D16938
-
03.doc
AMG3741EG
-
DR
-
SF
Instruction Manual
4 Channel Video Insert Unit with Ethernet for a Dual
Redundant Single Fibre Ring
The
AMG3741EG
-
DR
-
SF
is a rackmount four channel video insert unit designed to transmit 4 video
signals onto a singlemode optica
l fibre ring with Dual Redundant operation. It also provides full duplex
100BaseT Ethernet connectivity around the ring.
The
AMG3741EG
-
DR
-
SF
is designed to be powered using an
AMG2003
standalone power supply.
The
AMG3741EG
-
DR
-
SF
is designed to operate wi
th an
AMG3782EN
-
DR
-
SF
or rackmount
equivalent
AMG3782EGN
-
DR
-
SF
eight channel, video and Ethernet receive unit. The receive unit will
'drop off' up to eight video channels which are being transmitted around the fibre ring from up to eight
single channel or
equivalent number of multi
-
channel insert units.
AM
G Systems Ltd. reserves the right to make changes to this
document without notice. The information herein is believed to
be accurate. No responsibility is assumed by AMG for its use.
Page
2
of
8
AMG3741EG
-
DR
-
SF
Instruction
Sheet
D16938
-
03.doc
Contents
Introduction
3
Unit Functional Schematic
................................
................................
................................
..................
3
Video Input Channel Configuration
................................
................................
................................
....
3
Dual Redu
ndant Operation
................................
................................
................................
.................
3
Optical Connections
4
Connections
5
Video Input Connections
................................
................................
................................
....................
5
Optical Connections
................................
................................
................................
...........................
5
Powe
r Connection
................................
................................
................................
..............................
5
Ethernet Connection
................................
................................
................................
...........................
5
Front Panel Indicators
6
Power LED
................................
................................
................................
................................
..........
6
Video Input LED’s
................................
................................
................................
...............................
6
Fibre Optic
LED’s
................................
................................
................................
...............................
6
Ethernet Data LED’s
................................
................................
................................
...........................
6
Ethernet Data Configuration
7
Ethernet Data Configuration
................................
................................
................................
...............
7
Ethernet Data Connections
................................
................................
................................
................
7
Ethernet Operation
7
Physical Information
8
Dimensions
................................
................................
................................
................................
.........
8
Mounting Details
................................
................................
................................
................................
.
8
Removal / replacement from / to the Case
................................
................................
.........................
8
Safety
8
Maintenance and Repair
8
AMG Systems Ltd. reserves the right to make changes to this
document without notice. The information herein is believed to
be accurate. No responsibility is assumed by AMG
for its use.
Page
3
of
8
AMG3741EG
-
DR
-
SF
Instruction
Sheet
D16938
-
03.doc
Introduction
Unit Functional Schematic
The
AMG3741EG
-
DR
-
SF
transmits and receives the optical
signals from both a primary and
seconda
ry optical channel.
These optical channels are
transmitted on the same optical
fibre in opposite directions,
operating at different wavelengths.
The primary channel operates on
1550nm and the secondary
channel on 1310nm.
The
AMG3741EG
-
DR
-
SF
receives
and drops off Ethernet signals transmitted from an
AMG3782EGN
-
DR
-
SF
receiver, it then inserts video and Ethernet signals onto the outgoing optical signal.
As each unit regenerates the optical signal, the optical dynamic range between each optically
conn
ected node is 17dB.
Video Input Channel Configuration
At the
AMG3741E
-
DR
-
SF
or rackmount
AMG3741EG
-
DR
-
SF
insert unit, video signals present at the
BNC inputs can be inserted on one to eight video channels transmitted on the optical fibre. The first
video
channel number of each insert unit is set by the rotary switch on the front panel of the unit.
It is normal to set each insert unit to a different channel number. If the same number is used twice, an
insert unit connected 'down stream' on the primary opt
ical route will 'over
-
write' any coincident video
channels coming from the previous insert unit and those video signals will be lost.
The switch channel numbers 1 to 8, correspond to video channels 1
-
8. Unused switch channel
numbers 0 & 9 duplicate video
channel selections 1 & 8 respectively. i.e. setting switch to position 0 or
1 selects video channel 1 and setting switch to position 8 or 9 selects channel 8.
Dual Redundant Operation
In normal operation where optical connection to both the previous uni
t and subsequent insert units is
OK, video and data signals are transmitted on the primary output and data is received from the
primary input. The secondary optical input is independent and is regenerated on the secondary output.
If the primary input sign
al is not present, a unit will shut down the secondary output to inform the
previous unit that the signal route is not OK. The previous unit will then send out the video and data
signals on its secondary output in the opposite direction. This signal will b
e repeated around the ring to
get back to this unit on the secondary route. As the primary input is not present on this unit, the data
signal will now be taken from the secondary optical input thus maintaining integrity of the data
transmission.
If the se
condary input signal is not present, an insert unit will assume that the route to the next unit is
not OK and send out the video and data signal on the secondary optical output. This video and data
will be transmitted to the next unit around the ring in th
e opposite direction on the secondary route.
AMG Systems Ltd. reserves the right to make changes to this
document without notice.
The information herein is believed to
be accurate. No responsibility is assumed by AMG for its use.
Page
4
of
8
AMG3741EG
-
DR
-
SF
Instruction
Sheet
D16938
-
03.doc
Optical Connections
The
AMG3741E
-
DR
-
SF
or rackmount
AMG3741EG
-
DR
-
SF
is designed to be connected in a ring or
point to point system. In a ring system, single, dual and four channel insert units respectively c
an be
combined to make up an 8 channel video transmission system as illustrated below.
If a fibre link is broken, operation of the ring continues by making use of the secondary optical fibre
route as below:
If multiple breaks occur, operation is ma
intained with all the units still physically connected to the
receiver. For the scenario shown below camera signals and control would now be lost from cameras 1,
2 and 3 as there is now no physical connection between the transceivers and the receiver. Howe
ver
operation of cameras 4,5,6,7 and 8 remains fully functional.
AMG Systems Ltd. reserves the right to make changes to this
document without notice. The information herein is believed to
be accurate. No responsibility is assumed by AMG for its use.
Page
5
of
8
AMG3741EG
-
DR
-
SF
Instruction
Sheet
D16938
-
03.doc
Connections
Video Input Connections
No. of channels
................................
....
4
Connector
................................
............
75 ohm BNC Socket.
Input Impedance
................................
..
75 ohm terminated.
Input Level
................................
...........
1 volt p
-
p nominal
Frequency Response
..........................
10Hz to 7MHz.
Opt
ical Connections
PRIMARY OPTO OUT
Connector
................................
............
LC/PC
Primary Optical Launch Power
............
-
5dBm
Wavelength
................................
..........
1550nm
Secondary Optical Sensitivity
..............
-
22dBm
Wavelength
................................
..........
1310nm
PRIMARY OPTO IN
Connector
................................
............
LC/PC
Primary Optical Sensitivity
...................
-
22dBm
Wavelength
................................
..........
1550nm
Secondary Op
tical Launch Power
.......
-
5dBm
Wavelength
................................
..........
1310nm
Power Connection
Connector Type
................................
...
2.1mm screw lock long power jack
–
centre positive
Connector Partno.
...............................
Switchcraft S761K, AMG G16125
-
00
Supply Voltage
................................
....
13.5 to 18.0 Volts DC.
Maximum Power
................................
.
5 Watts
Ethernet Con
nection
Ethernet Data Connector
....................
RJ45
Interface
................................
...............
Auto
-
negotiation up to 100BASE
-
TX full duplex
Ethernet Data Rate
..............................
Maximum 100Mb/s total Ethernet traffic on fibre
AMG Systems Ltd. reserves the right to make changes to this
document without notice. The information herein is believed to
be accurate. No responsibility is assumed b
y AMG for its use.
Page
6
of
8
AMG3741EG
-
DR
-
SF
Instruction
Sheet
D16938
-
03.doc
Front Panel Indicators
Power LED
Power
................................
...................
Green
-
unit powered
Off
-
no power applied to unit
Video Input LED’s
Video Present CH1
-
4
...........................
Green
-
video signal present on input BNC
R/G
-
channel present but no video on I/P BNC
Fibre Optic LED’s
Primary Opto Sync TX
.........................
Green
-
optical channel transmitting
Off
-
optical channel not transmitting
Prima
ry Opto Sync RX
.........................
Green
-
optical channel receiving
Org
-
optical channel receiving but not sync.
Off
-
optical channel not receiving
Secondary Opto Sync TX
....................
Green
-
optical channel transmitting
Off
-
optical channel not transmitting
Secondary Opto
Sync RX
....................
Green
-
optical channel receiving
Org
-
optical channel receiving but not sync.
Off
-
optical channel not receiving
Ethernet Data LED’s
BANK A
Data Present TX (Ethernet)
.................
Green
-
data present on the Ethernet input
Off
-
no data present
on the Ethernet input
This represents the Ethernet signals being transmitted onto the optical fibre
Data Present RX (Ethernet)
.................
Green
-
data present on the Ethernet input
Off
-
no data present on the Ethernet input
This represents the Ethernet sign
als being received from the optical fibre
BANK B
Data Present TX
................................
.
Green
-
RJ45 Ethernet port operating at 100Mbit/s
Red
-
RJ45 Ethernet port operating at 10Mbit/s
Data Present RX
................................
..
Green
-
RJ45 Ethernet port operating full duplex
Off
-
RJ45 Ethe
rnet port operating half duplex
Note: the RJ45 Ethernet auto
-
negotiates up to 100Mbit/s full duplex.
AMG Systems Ltd. reserves the right to make changes to this
document without no
tice. The information herein is believed to
be accurate. No responsibility is assumed by AMG for its use.
Page
7
of
8
AMG3741EG
-
DR
-
SF
Instruction
Sheet
D16938
-
03.doc
Ethernet Data Configuration
Ethernet Data Configuration
The
AMG3741E
-
DR
-
SF
and rackmount equivalent
AMG3741EG
-
DR
-
SF
sends and receives Ethernet
data.
Ethernet Data Connections
RJ45 Pin
No.
Cat 5/6 Cable
Colour Code T568B
1
White/orange
2
Orange
3
White/green
4
Blue
5
White/blue
6
Green
7
White/brown
8
Brown
Ethernet Operation
In order for the AMG system to transmit Ethernet signals, a
n onboard RJ45 Ethernet interface or
X16003 Ethernet interface adaptor should be fitted to all units in the ring.
The Ethernet interface can operate at either 10Mbits/s half duplex, or 100Mbit/s full duplex. When all
the Ethernet interfaces around the ri
ng are operating at 100Mbit/s full duplex the system behaves as a
multi
-
port repeater. Data transmitted on any one port is transmitted out on all other ports with the
minimum of delay or buffering. The nominal bandwidth available for Ethernet transmission
within the
ring is 100Mbit/s when Ethernet only, or 50MBit/s when the low speed data option is also used. If one
node is transmitting, the entire bandwidth is available for this traffic. If multiple nodes transmit
simultaneously on the ring, then the bandw
idth is shared between each node as required. With similar
traffic at each node the sharing would be nominally equal.
Although the limit for the number of video channels which can be transmitted around the ring is eight,
up to 64 nodes can be attached fo
r distributing Ethernet signals with the bandwidth sharing
implemented. The units use Flow Control (Pause Frames) to limit the access to the ring to share the
bandwidth and to ensure that no data is lost. When an Ethernet port is operating at 10Mbits/s hal
f
duplex, this port will now only receive data from a receive unit rather than all ports as when operating
at 100Mbits/s full duplex.
The 100BaseT port does not implement MDI/MDIX; it should be connected with a straight though
cable to an external switch
port and with a cross over cable when connected directly to a PC or DTE.
AMG Systems Ltd. reserves the right to make changes to this
document without notice. The information herein is believed to
be accurate. No responsibility is assumed by AMG for its use.
Page
8
of
8
AMG3741EG
-
DR
-
SF
Instruction
Sheet
D16938
-
03.doc
Physical Information
Dimensions
Height
................................
...................
3U Plug
-
in
Width
................................
....................
14HP
Depth
................................
...................
170mm excluding connectors
Weight
................................
..................
750grams
Mounting Details
The unit is designed to be mounted within an AMG20
09 or AMG2015 Subrack on standard card
guides.
Removal / replacement from / to the Case
Note:
-
The AMG unit PCB's are static sensitive. Handle with proper care and use normal electrostatic
discharge (ESD) procedures. Use properly grounded protection (f
or example, wrist straps) when
handling the PCB.
To remove units from the case to access the data expansion boards and the daughter boards, remove
the 2 or 4 fixing screws on the rear panel and slide the PCB's out of the case.
Ensure that the fibres do
not snag or get trapped.
To replace the PCB's into the case, slide the PCB's gently into the case aligning the boards with the
appropriate slots. Ensure that the fibre do not snag or get trapped.
Safety
AMG Optical Fibre Products use Class 1 laser sys
tems in accordance with EN 60825
-
2:2000.
It is always advisable to follow good practice when working with optical fibre systems. This includes:
Do not stare with unprotected eyes or with any unapproved collimating device at fibre
ends or connector faces,
or point them at other people.
Use only approved filtered or attenuating viewing aids
For other safety issues and advice on good practice associated with optical fibre systems, please see
EN 60825
-
2:2000 or your local safety officer.
Maintenance and R
epair
There are no user serviceable parts within AMG products. See unit data sheet for full specification.
In case of problem or failure, please call your local support centre or contact:
AMG Systems Ltd.
at
3 The Omega Centre, Stratton Business Park, B
iggleswade, Beds., SG18 8QB, UK.
Phone
+44 (0) 1767 600 777
Technical Support
+44 (0) 1767 604 491
Email
techsupport@amgsystems.com
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